Got an old cell phone? Bring it to FOSE and support the troops.

What’s the best way to dispose of an old cell phone? If you’re attending the FOSE trade show, you can drop it off at the show for recycling and help support U.S. troops overseas in the process.

FOSE, being held April 3-5 at the Washington Convention Center, aligned last year with Operation Gratitude to support its cell-phone recycling program to help raise funds for care packages sent to service members.

Operation Gratitude, based in California and now in its ninth year, collects donations through a variety of channels and to date has delivered more than 750,000 care packages to troops. The cell-phone recycling program, which also lets people ship used phones, sends them to GRC Wireless Recycling, which pays up to $30 for each phone.

The cell-phone program has raised more than $100,000 since it was started in 2005, Carolyn Blashek, Operation Gratitude’s founder, said in an e-mail.

Blashek said the organization’s goal is twofold: lift military morale and give people an opportunity to say thanks to the troops. Taking an old phone to FOSE makes it easy, not to mention green.

FOSE isn’t entirely about new technologies — even some old tech can do some good.